11-07-2010, 10:25 PM
sir,hoping you will send me the ppt of audiospotlighting.
11-07-2010, 10:25 PM
sir,hoping you will send me the ppt of audiospotlighting.
18-09-2010, 11:15 AM
for more info about audiospotlighting ppt
https://seminarproject.net/Thread-audio-...t?pid=9286 https://seminarproject.net/Thread-audio-...?pid=23213
18-09-2010, 04:29 PM
24-01-2017, 02:56 PM
I want audio SPotlighting.. Ppt
24-01-2017, 07:01 PM
Hey dear thanks for sharing your thoughts this is really amazing and informative !
02-02-2017, 01:53 PM
Audio Spot Lighting is a very recent technology that creates focused sound beams similar to beams of light coming out of a flashlight. By "shining" the sound to a location, specific listeners can be pointed with sound without others hearing it. It uses a combination of non-linear acoustics and some extravagant math. But it's real and it's okay to hit the socks of any conventional speaker.
This acoustic device comprises a loudspeaker which triggers inaudible ultrasonic pulses with very small wavelengths which act in much the same way as a narrow column. The ultrasonic beam acts as an airborne loudspeaker and as the beam moves through the air, gradual distortion takes place predictably due to the property of non-linearity of air. This results in audible components that can be accurately predicted and accurately controlled. Joseph Pompey's Holosonic Research Labs invented the audio projector that is made from a sound processor, an amplifier and the transducer. The American Technology Corporation developed the Hyper Sonic Sound Directed Sound System. Both use ultrasonic-based solutions to transmit sound in a focused beam. The audio projector can be directed to a particular listener or to a point where it is reflected. Audio Spot Lighting is a very recent technology that creates focused sound beams similar to beams of light coming out of a flashlight. By "shining" the sound to a location, the specific listeners can be pointed to the sound without others nearby to hear it, that is, to focus the sound in a coherent and highly directional beam. It uses a combination of non-linear acoustics and some extravagant math. But it's real and it's okay to hit the socks of any conventional speaker. Audio Spotlight and Hyper Sonic sound technology (developed by American Technology Corporation) uses ultrasonic energy to create extremely narrow beams that behave like beams of light. The audio projector exploits the property of air non linearity. When inaudible sonic pulses are emitted in the air, it spontaneously converts the inaudible ultrasound into audible audible tones, so it is shown that, as with water, the propagation of sound in the air is equally non-linear and can be calculated mathematically. A device known as a parametric matrix employs non-linearity of air to create audible by-products from inaudible ultrasounds, resulting in an extremely directional broadband acoustic source and beam of light. This source can be projected over an area similar to a projector, and creates a specialised real sound distant from the transducer. The ultrasonic column acts as an airborne speaker, and as the beam moves through the air, gradual distortion takes place in a predictable way. This results in audible components that can be accurately predicted and accurately controlled Theory What ordinary audible sound and conventional speakers are missing? What we need? Approximately half a dozen types of commonly used speakers are in general use today. They range from piezoelectric tweeters that recreate the upper end of the audio spectrum, to various types of mid range speakers and woofers that produce the lowest frequencies. Even the most sophisticated hi-fi speakers have a hard time playing bass clean, and generally rely on a large woofer / cabinet combination to aid in the task. Whether they are dynamic, electrostatic or some other design based on transducers, all speakers today have one thing in common: they are direct radiation - that is, they are essentially a piston-like device designed to directly pump moving air molecules to create Sound waves we hear. The audible parts of the sound tend to extend in all directions from the point of origin. They do not travel like narrow beams, so you do not need to be right in front of a radio to listen to music. In fact, the audible sound beam angle is very wide, only about 360 degrees. This means that the sound you hear will spread through the air equally in all directions. |
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